Pensions and Other Postretirement Benefits (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016 USD ($) Plan	Oct. 01, 2016 USD ($)	Jul. 02, 2016 USD ($)	Apr. 02, 2016 USD ($)	Dec. 31, 2015 USD ($)	Oct. 03, 2015 USD ($)	Jul. 04, 2015 USD ($)	Apr. 04, 2015 USD ($)	Dec. 31, 2016 USD ($) Plan	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Change in benefit obligation [Roll forward]
Increase in PBO due to new actuarial tables										$ (8,000)	$ 24,000
Amounts recognized in balance sheet associated with retirement benefit plans [Abstract]
Included in other assets	$ 248				$ 21,361				$ 248	21,361
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	(7,479)				(7,065)				(7,479)	(7,065)
Accrued pension and other postretirement costs	(257,789)				(264,618)				(257,789)	(264,618)
Accumulated other comprehensive loss	88,860				147,674				88,860	147,674
Components of actuarial items [Abstract]
Total actuarial items	88,860				147,674				88,860	147,674
Components of net periodic pension cost [Abstract]
Curtailment and settlement losses (gains)	79,321	$ 0	$ 0	$ 0	0	$ 0	$ 0	$ 0	79,321	0	15,588
Amounts that will be amortized from accumulated other comprehensive loss into net periodic pension cost during next fiscal year									6,400
Other retirement obligations [Abstract]
Company's matching expense for 401(k) savings plans									5,039	5,369	5,285
U.S. Pension Plans [Member]
Change in benefit obligation [Roll forward]
Benefit obligation at beginning of year				274,122				301,475	274,122	301,475
Service cost									0	0	0
Interest cost									11,788	11,657	13,821
Plan amendments and initiations									0	0
Transfer from equity affiliate (liabilities)									0	0
Actuarial (gains) losses									19,916	(23,099)
Benefits paid									(15,625)	(15,911)
Curtailments and settlements									(251,287)	0
Currency translation									0	0
Benefit obligation at end of year	38,914				274,122				38,914	274,122	$ 301,475
Number of pension plan participants for whom annuity contracts were purchased											700
Participants who accepted voluntary lump-sum offer											800
Reduction of plan participants											1,500
Percentage of total participants											23.00%
Change in plan assets [Roll forward]
Fair value of plan assets at beginning of year				258,092				273,644	258,092	273,644
Actual return on plan assets									14,068	(5,439)
Defined Benefit Plan, Transfer from Equity Affiliate (assets)									0	0
Company contributions									(5,248)	5,798
Benefits paid									(15,625)	(15,911)
Curtailments and settlements									(251,287)	0
Currency translation									0	0
Fair value of plan assets at end of year	0				258,092				0	258,092	$ 273,644
Funded status at end of year	(38,914)				(16,030)				(38,914)	(16,030)
Amounts recognized in balance sheet associated with retirement benefit plans [Abstract]
Included in other assets	0				21,202				0	21,202
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	(35)				(51)				(35)	(51)
Accrued pension and other postretirement costs	(38,879)				(37,181)				(38,879)	(37,181)
Accumulated other comprehensive loss	7,313				76,141				7,313	76,141
Total	(31,601)				60,111				(31,601)	60,111
Components of actuarial items [Abstract]
Unrecognized net actuarial loss (gain)	6,241				74,926				6,241	74,926
Unamortized prior service (credit) cost	1,072				1,215				1,072	1,215
Total actuarial items	7,313				76,141				7,313	76,141
Projected and accumulated benefit obligations [Abstract]
Accumulated benefit obligation, all plans	38,914				274,122				38,914	274,122
Plans for which the accumulated benefit obligation exceeds plan assets [Abstract]
Projected benefit obligation	38,914				37,232				38,914	37,232
Accumulated benefit obligation	38,914				37,232				38,914	37,232
Fair value of plan assets	$ 0				$ 0				0	0
Components of net periodic pension cost [Abstract]
Net service cost									0	0	0
Interest cost									11,788	11,657	13,821
Expected return on plan assets									(11,302)	(13,566)	(14,892)
Amortization of actuarial losses									6,513	8,175	7,166
Amortization of prior service (credit) cost									144	64	(56)
Curtailment and settlement losses (gains)									79,321	0	15,588
Net periodic benefit cost									$ 86,464	$ 6,330	21,627
Weighted average assumptions used to calculate benefit obligations [Abstract]
Discount rate (in hundredths)	4.25%				4.50%				4.25%	4.50%
Rate of compensation increase (in hundredths)	0.00%				0.00%				0.00%	0.00%
Weighted average assumptions used calculating net periodic benefit cost [Abstract]
Discount rate (in hundredths)									4.50%	4.00%
Rate of compensation increase (in hundredths)									0.00%	0.00%
Expected return on plan assets (in hundredths)									4.50%	5.00%
Estimated future benefit payments [Abstract]
2017	$ 1,765								$ 1,765
2018	1,776								1,776
2019	7,664								7,664
2020	2,929								2,929
2021	2,959								2,959
2022-2026	15,435								15,435
Non-U.S. Pension Plans [Member]
Change in benefit obligation [Roll forward]
Benefit obligation at beginning of year				260,554				289,663	260,554	$ 289,663
Service cost									3,291	3,265	3,275
Interest cost									5,475	5,636	8,555
Plan amendments and initiations									291	267
Transfer from equity affiliate (liabilities)									358	0
Actuarial (gains) losses									17,202	(1,871)
Benefits paid									(12,607)	(12,230)
Curtailments and settlements									0	0
Currency translation									(8,137)	(24,176)
Benefit obligation at end of year	266,427				$ 260,554				266,427	260,554	289,663
Change in plan assets [Roll forward]
Fair value of plan assets at beginning of year				51,263				49,156	51,263	49,156
Actual return on plan assets									2,588	1,159
Defined Benefit Plan, Transfer from Equity Affiliate (assets)									358	0
Company contributions									27,311	15,621
Benefits paid									(12,607)	(12,230)
Curtailments and settlements									0	0
Currency translation									(2,823)	(2,443)
Fair value of plan assets at end of year	66,090				51,263				66,090	51,263	49,156
Funded status at end of year	(200,337)				(209,291)				(200,337)	(209,291)
Amounts recognized in balance sheet associated with retirement benefit plans [Abstract]
Included in other assets	248				159				248	159
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	(6,405)				(6,089)				(6,405)	(6,089)
Accrued pension and other postretirement costs	(194,180)				(203,361)				(194,180)	(203,361)
Accumulated other comprehensive loss	82,360				73,216				82,360	73,216
Total	(117,977)				(136,075)				(117,977)	(136,075)
Components of actuarial items [Abstract]
Unrecognized net actuarial loss (gain)	82,360				73,216				82,360	73,216
Unamortized prior service (credit) cost	0				0				0	0
Total actuarial items	82,360				73,216				82,360	73,216
Projected and accumulated benefit obligations [Abstract]
Accumulated benefit obligation, all plans	247,838				242,054				247,838	242,054
Plans for which the accumulated benefit obligation exceeds plan assets [Abstract]
Projected benefit obligation	253,390				247,960				253,390	247,960
Accumulated benefit obligation	240,793				234,910				240,793	234,910
Fair value of plan assets	$ 56,649				$ 39,463				56,649	39,463
Components of net periodic pension cost [Abstract]
Net service cost									3,291	3,265	3,275
Interest cost									5,475	5,636	8,555
Expected return on plan assets									(2,117)	(1,798)	(2,109)
Amortization of actuarial losses									4,733	5,131	2,700
Amortization of prior service (credit) cost									261	(282)	(5)
Curtailment and settlement losses (gains)									841	452	1,137
Net periodic benefit cost									$ 12,484	$ 12,404	13,553
Weighted average assumptions used to calculate benefit obligations [Abstract]
Discount rate (in hundredths)	1.76%				2.30%				1.76%	2.30%
Rate of compensation increase (in hundredths)	2.12%				1.99%				2.12%	1.99%
Weighted average assumptions used calculating net periodic benefit cost [Abstract]
Discount rate (in hundredths)									2.30%	2.15%
Rate of compensation increase (in hundredths)									1.99%	1.97%
Expected return on plan assets (in hundredths)									3.38%	3.86%
Estimated future benefit payments [Abstract]
2017	$ 14,754								$ 14,754
2018	13,659								13,659
2019	14,860								14,860
2020	14,373								14,373
2021	14,624								14,624
2022-2026	77,493								77,493
U.S. Postretirement Plans [Member]
Change in benefit obligation [Roll forward]
Benefit obligation at beginning of year				7,909				8,677	7,909	$ 8,677
Service cost									126	121	115
Interest cost									340	333	351
Actuarial (gains) losses									(25)	(550)
Benefits paid									(703)	(672)
Curtailments and settlements									0	0
Currency translation									0	0
Benefit obligation at end of year	7,647				$ 7,909				7,647	7,909	8,677
Change in plan assets [Roll forward]
Fair value of plan assets at beginning of year				0					0
Benefits paid									(703)	(672)
Fair value of plan assets at end of year	0				0				0	0
Funded status at end of year	(7,647)				(7,909)				(7,647)	(7,909)
Amounts recognized in balance sheet associated with retirement benefit plans [Abstract]
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	(717)				(701)				(717)	(701)
Accrued pension and other postretirement costs	(6,930)				(7,208)				(6,930)	(7,208)
Accumulated other comprehensive loss	(2,287)				(3,129)				(2,287)	(3,129)
Total	(9,934)				(11,038)				(9,934)	(11,038)
Components of actuarial items [Abstract]
Unrecognized net actuarial loss (gain)	(1,303)				(1,308)				(1,303)	(1,308)
Unamortized prior service (credit) cost	(984)				(1,821)				(984)	(1,821)
Total actuarial items	$ (2,287)				$ (3,129)				(2,287)	(3,129)
Components of net periodic pension cost [Abstract]
Net service cost									126	121	115
Interest cost									340	333	351
Amortization of actuarial losses									(30)	90	(140)
Amortization of prior service (credit) cost									(837)	(837)	(824)
Net periodic benefit cost									$ (401)	$ (293)	(498)
Weighted average assumptions used to calculate benefit obligations [Abstract]
Discount rate (in hundredths)	4.25%				4.50%				4.25%	4.50%
Rate of compensation increase (in hundredths)	0.00%				0.00%				0.00%	0.00%
Weighted average assumptions used calculating net periodic benefit cost [Abstract]
Discount rate (in hundredths)									4.50%	4.00%
Rate of compensation increase (in hundredths)									0.00%	0.00%
Estimated future benefit payments [Abstract]
2017	$ 717								$ 717
2018	709								709
2019	699								699
2020	681								681
2021	656								656
2022-2026	$ 2,695								$ 2,695
Other postretirement benefits [Abstract]
Number of unfunded non-pension postretirement plans | Plan	2								2
Non-U.S. Postretirement Plans [Member]
Change in benefit obligation [Roll forward]
Benefit obligation at beginning of year				6,488				$ 7,283	$ 6,488	$ 7,283
Service cost									268	273	307
Interest cost									143	147	244
Actuarial (gains) losses									171	(50)
Benefits paid									(221)	(389)
Curtailments and settlements									0	(25)
Currency translation									(224)	(751)
Benefit obligation at end of year	$ 6,625				$ 6,488				6,625	6,488	7,283
Change in plan assets [Roll forward]
Fair value of plan assets at beginning of year				$ 0					0
Benefits paid									(221)	(389)
Fair value of plan assets at end of year	0				0				0	0
Funded status at end of year	(6,625)				(6,488)				(6,625)	(6,488)
Amounts recognized in balance sheet associated with retirement benefit plans [Abstract]
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	(322)				(224)				(322)	(224)
Accrued pension and other postretirement costs	(6,303)				(6,264)				(6,303)	(6,264)
Accumulated other comprehensive loss	1,474				1,446				1,474	1,446
Total	(5,151)				(5,042)				(5,151)	(5,042)
Components of actuarial items [Abstract]
Unrecognized net actuarial loss (gain)	1,474				1,446				1,474	1,446
Unamortized prior service (credit) cost	0				0				0	0
Total actuarial items	$ 1,474				$ 1,446				1,474	1,446
Components of net periodic pension cost [Abstract]
Net service cost									268	273	307
Interest cost									143	147	244
Amortization of actuarial losses									68	76	38
Amortization of prior service (credit) cost									0	0	0
Net periodic benefit cost									$ 479	$ 496	$ 589
Weighted average assumptions used to calculate benefit obligations [Abstract]
Discount rate (in hundredths)	1.50%				2.31%				1.50%	2.31%
Rate of compensation increase (in hundredths)	2.58%				2.69%				2.58%	2.69%
Weighted average assumptions used calculating net periodic benefit cost [Abstract]
Discount rate (in hundredths)									2.31%	2.25%
Rate of compensation increase (in hundredths)									2.69%	2.87%
Estimated future benefit payments [Abstract]
2017	$ 322								$ 322
2018	275								275
2019	378								378
2020	580								580
2021	414								414
2022-2026	$ 2,456								$ 2,456
Other postretirement benefits [Abstract]
Number of European subsidiaries with unfunded non-pension postretirement plans | Plan	2								2
Other Retirement Obligations [Member]
Amounts recognized in balance sheet associated with retirement benefit plans [Abstract]
Accrued pension and other postretirement costs	$ (11,497)				$ (10,604)				$ (11,497)	$ (10,604)
Deferred Compensation [Member]
Defined benefit pension plans [Abstract]
Assets held in trust	16,632				15,717				16,632	15,717
Non-qualified Pension Plans [Member]
Defined benefit pension plans [Abstract]
Assets held in trust	22,896				21,137				22,896	21,137
Dr. Felix Zandman [Member] | Non-qualified Pension Plans [Member]
Defined benefit pension plans [Abstract]
Assets held in trust	2,389				$ 2,995				2,389	$ 2,995
Deferred compensation arrangement, annual retirement benefit to surviving spouse	$ 614								$ 614